In a large bowl, combine the pecans, almonds and peanuts. Combine butter and Worcestershire sauce; pour over nuts and toss to coat.
Spread in a single layer in an ungreased 15-in. x 10-in. x 1-in. baking pan. Bake at 300° for 30 minutes or until browned, stirring every 10 minutes.
Transfer warm nuts to a bowl. Combine the chili powder, garlic salt and cayenne; sprinkle over nuts and stir to coat. Serve warm, or allow to cool before storing in an airtight container. Yield: 3 cups.